Check your cord going from your Satellite TV receiver to your television--if you are using a rca cord, the cord could have come loose.
hitachi tv has sound no picture
Picture is AM, sound is AM or FM
The first movie with picture and sound was "The Jazz Singer".
Sound and picture are transmitted on separate cables for Cable TV providers.
Talkies
LM is video (picture)CM is auto (sound)
The colors and the picture need to come into focus where as the sound is already in clear pitch.
The cast of Picture and Sound Rushes - 1974 includes: Morgan Fisher as Narrator
sound waves don't have enough room
If you have hooked up your DVD player and get sound but no picture, try changing the picture source from TV to AV 1.
It doesn't work.
Hieroglyphics